[Sbcl-help] Callback from C

[Robert B. <beb...@gm...>]

Hi all,

Is it actually possible to callback from C with SBCL. According to the 
manual it's tricky but the CFFI manual claims that it's possible on some 
platforms with SBCL.

I am a musician and enjoy messing around with audio DSP. I currently use 
SBCL on a GNU/Linux platform and have written a C wrapper for the JACK 
audio server. I am getting pretty good real-time performance with the 
current blocking method I am using (about 10 -15 ms latency) but it 
should improve if I can get the server to callback into LISP.

I have written the FFI interface using SBCL's interface but if CFFI 
works I will recode to use it.

Another question I have is whether there could be some unpleasant side 
effects of having a real-time thread callback into LISP.

Thanks,

Robert.